Display screen or portion thereof with a graphical user interface



The patent or application file contains at least one drawing executed incolor. Copies of this patent or patent application publication withcolor drawing(s) will be provided by the Office upon request and paymentof the necessary fee.

The sole FIGURE is a front view of a display screen or portion thereofwith a graphical user interface showing our new design.

The broken line showing of the display screen or portion thereof isincluded for the purpose of illustrating environmental structure andforms no part of the claimed design.

CLAIM The ornamental design for display screen or portion thereof with agraphical user interface, as shown and described.